I've bought this bag
http://www.amazon.com/ZUCA-Frame-Ins.../dp/B0016FVGYW
The interior has not been made for my camera, i.e it does not have the protection. However, I intend to have the inside finish with a foam especially made for my XL2 and it accessories. The advantages that I've founds with this bag are :
1 - You can carry this bag (the PRO one only) inside the plane (Length + width + height = 42" Total, within FAA requirement);
2 - It has wheels (very solid);
3 - The frame is very solid (can support up to 300 pounds); and
4 - You can sit on it which I intend to when filming;